182KiB, 1280x1280, mars canyon.jpg View SameGoogleiqdbSauceNAO Anonymous Wed 13 Oct 02:35:55 2021 No.13745062 ViewReplyOriginalReport Quoted By: >>13746070 >>13746088 >>13746663 If you went to the lowest natural point on Mars and dug an artificial trench another 10 miles deep under that, what would the atmospheric pressure be at the bottom? What about 20 miles deep? 30?